hello all just a question for all with some experience im looking at getting a dump valve but not sure what one there is a forge one and like baileys dump valve or blitz what go direct to my intercooler also what benefits would i get from it ? cheers jc
my scooby is 2000 classic face-lift

 

Stick with the standard one

 

I've just removed mine as it was destroying my mpg, now getting 250 miles to a tank compared to 190.

 

leaking metered air on part throttle? not good for the bores either

 

Sounds like it was on its way out, just replace it with another standard one as any VTA dumpvalve will have a similar effect on your fuel economy

 

To clarify, I've removed the Turbosmart one and put it back standard.

 

if it was set too soft (thes are adjustable spring pressure ones?) then it may of been leaking metered air on part throttle

 

Standard one ALL DAY LONG !!!
I had the Baileys one since I bought the car and after 2 years I decided to check if there is any difference so put the OEM one on.
What a DIFFERENCE !!!
Aftermarket Dump Valves - NEVER AGAIN !!! Unless going for high BHP (400bhp) than will have no choice.

 

is it just the mpg sticking with the old one i just like the sound of them the forge one has springs to adjust it

 

Car will run smoother too, especially under partial throttle and will reach full boost quicker after a gear change.

 

what ways are there that aint to expensive to do little mods that will make her faster etc was thinking of trying to get another inter cooler and pipes did think of front mount inter cooler just not sure to honest

 

The best dunp valve is the one in the dustbin

Keep the standard one on
It makes the car run better and Subaru designed it that way

If you feel the need to impress young teenagers at McDondalds get some go faster stripes and leave it in 2nd gear and rev more ,thus making more noise

Listen to the experts on here

 

This question should be a Sticky.

Q: "Which dump valve is best?"

A: "The one Subaru originally put on your car"

Q "But it doesn't make a noise, I want a noise"?

A "You are a ****"

End of thread!

 

 

I've got an aftermarket one on mine, but it IS a recirculating type, even though I'm running 400+ with a FMIC.

Scoobyjoe: look first at the brakes: do they have SUBARU across them? If not, upgrade those first.

Then look at the suspension: solid droplinks all round, plus a stiffer REAR arb, (leave the front one alone). Then get the 4-wheel geometry done somewhere that knows what it's doing, I can recommend Carnetix and Powerstation.

THEN you'll be able to drive faster safely.

Depending what exact ecu you have, some can't be remapped and engine changes without a remap spells big £££££ in repair bills, maybe total failure.....

 

so just leave the standard one on then lol
what sort of upgrades can i do that are not going to break the bank

 

Full exhaust, panel filter, fuel pump and a remap, this should get you about 270-280bhp

 

I got carried away when i first got my scooby some 5 years ago and bought a turbosmart twin big mistake as it makes a loud noise thats ok if your 18 but unfortuneately im not

 

funny as, lol.

 

its got a 3-4" all the way through it has green panel filter not sure about fuel pump the person i got it from said the last bloke had it remaped and was 278 bhp but what truth i dont know but bloke i had working on it said its one of the fastest he drove

 

lmao

 

Dump valves are like cliteris's , every cu#t has one .

 

well i had a version 2 sti ra which hated dump valves ran best with standard valve, ive got a version 4 sti at the moment which runs a blitz and is fine but the car was remapped by bob rawle last month so he probaly mapped it to cope with the pressure loss.

 

just put a GFB Respons on mine and had a remap too, and mine seems to be running great

more info here buddy and some good feed back on them too

https://www.scoobynet.com/scoobynet-...ved-today.html

 

and every lad wants to play with one

 

I had a Bailey dump valve on I couldn't rev it in second gear to 60 can now after putting standard one back on. Keep original one on does run much smoother.

 

is a waste gate valve the same as a dump valve? i have a waste gate on my car would you recommend putting the standard 1 on? new to subaru's so i dont have a clue lol

 

a wastegate is a valve inside your turbo exhaust housing which is opened by an actuator to allow exhaust gas to by-pass the exhaust turbine and regulate the boost produced by the turbo.
a dump valve or diverter valve opens when there is a manifold vacuum i.e the throttle is shut, and removes excess pressure from the inlet to prevent compressor surge. a dump valve will vent this pressure to the atmosphere whereas the standard diverter valve will pass the air back into the inlet side of the compressor housing.

 

my mate fitted the forge one to mine, all mapped up and no snags what so ever to date, must just depend on which one you fit imho

 

im running a ssqv as cant really fit the standard one with a rotated inlet and FMIC
given the choice i think i would go standard
but i have no issues running the HKS
once or twice when i have let of the gas she has popped loudly from the exhaust dont know why this is but all seems well